Title: Rate of torque and electromyographic development during anticipated eccentric contraction is lower in previously strained hamstrings
Question: Does prior injury have an effect on myoelectrical activity of the hamstrings during tasks requiring high rates of torque development?
Key Takeaway: Previous HSI does indeed have a negative effect on RTD and impulse, with myoelectrical activity reductions interestingly confined to the biceps femoris long head (BFlh).
Summary: Recreational athletes with a history of unilateral HSI participate in an isokinetic dynamometry protocol with sEMG taken as a measurement.
- Previously injured hamstrings displayed lower rates of torque development and impulse during slow maximal eccentric contraction compared to their contralateral uninjured limb
- Lower myoelectrical activity was confined to the biceps femoris long head.
- Regardless of whether these deficits are the cause of or the result of injury, these findings could have important implications for hamstring strain injury and re-injury.